Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af93393f2c975a9738d4be0f8ab38c9c8016e4873885beb847aee845f9fcfdec' 
  AND token = 'lgOkcoR89DtoKcpStI1YMvmUwGPftckNptRwqeBV7HI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}